Wireless data rates have doubled every eighteen months over the last three decades, as predicted by Edholm’s law. Direct extrapolation from [KP13] predicts that Terabit- per-second (Tbps) link speed will even be achieved before 2030, facilitating capacity well beyond current optical networks. To support the prediction, standardization especially in Wireless Local Area Networks (WLAN i.e. 802.11 family) and high-rate Wireless Speciality Networks (WSN i.e. 802.15.3 family) is moving gradually from tens of Gbps beyond 100 Gbps. However, practical trials have shown that state-of-the-art radio links can approach the 100 Gbps milestone only at a 1–2 m distance over fixed links without beam steerability [RLG20]. This means that taking the next 1,000x increase in link capacity from 1 Gbps to 1 Tbps in practical networks will be a far from straightforward challenge for the next 5 to 10 years, especially for wide area but even for shorter-range mobile coverage.
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